Hi Apple Developer Community,
We have carefully reviewed the documentation on App Transfer and User Migration, but we still have a few unresolved questions regarding Apple Sign-In token behavior and testing strategies. Would appreciate any guidance!
- Token Behavior for Pre-Transfer App Versions
After the app transfer: If a user logs in via an existing pre-transfer version of the app (published under Team A before transfer), will the Apple Sign-In token’s sub (or private email) switch to new value tie to Team B, or unchanged?
This is critical for our user migration plan.
- Preserving sub Across Transfers (Internal Team Transfer)
Since our app-transfer is an internal transfer (no change in app ownership outside our organization), is there a way to retain the original sub value(or private email) for users after the transfer?
We are concerned that Apple Sign-In errors during the app transfer process may negatively impact user experience.
- Testing the Transfer Process Safely
We’d like to simulate the app transfer and user migration process in a sandbox/test environment before executing it in production. Is there a way to test app transfers without affecting live users? (e.g., a staging mode for transfers)
Thank you for your expertise! Any insights would be invaluable.